“His head injury was too severe, despite resuscitation attempts,” Bourgi said. He added that the other child suffered shrapnel wounds to the stomach but was in stable condition.

The tragedy struck on the 13th anniversary of the end of the 33-day war, during which the Israeli warplanes “rained an estimated 4 million submunitions on south Lebanon, the vast majority over the final three days,” a Human Rights Watch report said.

It called Israel’s use of cluster bombs “indiscriminate and disproportionate, in violation of [international humanitarian law], and in some locations possibly a war crime.”

Some 40 percent of the munitions did not explode, NGO Mines Advisory Group said.